The cord that outlines the upholstery on this piece has a direction, and getting it wrong is one of those faults nobody can name but everybody sees.
A decorative cord is made of strands twisted together, which means it has a lay - a direction the twist runs. Applied consistently, that lay catches light the same way all around the piece and the outline reads as one clean line. Turn a length end for end halfway round and the twist reverses; the light runs the other way along it, and that section reads slightly darker or brighter than the rest for no visible reason.
So the cord is applied in one direction throughout, and it is stitched rather than glued, with the stitches taken into the seam beneath it.
Where two lengths have to meet, the ends are not simply butted. Each is unlaid - the strands separated - tapered, and then laid back into the other so the twist continues through the join. Done properly the meeting point cannot be found by eye, and only just by hand.
The tassel on the bolster is finished from the same cord, so the whole scheme comes from one lot of trimming.